Air compressor



c. ovERDoRr-F ET AL AIR COMPRESSOR Filed Feb. 17. 1927 2 Sheets-Sheet 2 V IN1/mfom Kali/m erdarff By Lfaizn J/z,

ATTORNEY.

Patented Mar. 6, 1928.

UNITED STATES PATENT OFFICE..

CALVIN OVIERDORFF` AND J OHNJ UHQSZ, OF JOHNSTOWN, `PEN*'1\TSYITA `NIA. i

am COMPRESSOR.

Application mea February 17, 1927. serial irais-aces.

The present invention consists of an air compressor andis designed to compress the air in a facile, expeditious, and inexpensive manner to make the compressed air available as a motive agent without recourse to eX-y penwsive orl fragile apparatus for this purose.

Additional objects of the invention are yto provide a compressor which automatically lo operates under pressure of Vwater inducted into the compressor chambers, .only a single water inlet pipe being used to'supply both chambers of the compressor, the supply being selective byuse of an automatically op-` erated valve; to provide pressure-operated check valve `mechanism which coacts with the selective valve means to operate the lat- -ter for closing off the water supply in either ,j chamber when aV predeterminedl height hasV been reached; and to provide durable apparatus which requiresno adjustmentor re-` placement. l t y Other objects lof the invention will be apparent from the `following description of taken in connection with the accompanying drawings, wherein 1 "Fig 1 is a longitudinal fragmentary sec-` tional view of a compressor constructed in accordance with the present invention; y

Fig. 2 is a vertical` sectional view of the same; and

Fig.l 3 is a fragmentary perspective View of one end of the selective valve releasing lever.` f

l The compressor ofy the present invention embodies twin chambers or cylinders 5, each of which, in the present instance, Ais shown to, be of cylindrical configuration and yhas the outer end thereof closed, as .indicated water isinjected under pressure. The inner end of the opening y9 communicates with a transverse opening formed in the vpartition 8, in which a bushing 11 is mounted, theends of the latter projecting beyond the op,

posite faces ofthe partition. Thel bushing the present preferred form of the invention a rightanglef bar 14, which' is detachably at 6 and the innerend` openedand provided isprovided with` an inlet opening which complements the inlet opening 9 for communication with the inlet pipe 10.V 'A selective valve 12 is slidably mounted in the bush-V lng 11 and conforms to the contour of the latter. The'valve is equipped with a duct or way 13, the ends of which open through" the periphery of the valve into the chambers 5. Inlet ways l3f communicate with an intermediate part of the duct 13 and are selectivelyvregistrable with the inlet opening 9.

in a manner more'fully hereinafter set out. Communication is, inthis way, established between lther pipe 1() and ychambers 5 so that water injected through the pipe 10` will flow into either, one of the chambers `depending,

upon the position ofthe valve 12. v V

It is desired. that the valve "12 be automatically operated so that communication mountedon one face `of the partition 8 so thatthe upper edge thereofsupports the extended terminal of the bushing 11. The

:bar has kpivotally mountedthereon a bellcrank lever `15, ythe upper terminalof which is biurcated as indicated at 16 and adapted toreceive pintles 17 which project laterally from the., opposite ends of a trigger 18.

Each trigger has `the inner end thereof pivotally engaged with one end ofl the valve 12 asadvantageously illustratedin Fig.k 1; the

opposite end thereof projects outwardly for engagement in a `recess v19 formed1 in the upper marginal edge of the bar 14. l Y j The outer terminal of the lower end of between `the'water supply pipe and eitherf the bell-crank lever- 15. is pivotally engaged with one end of a linlr20, the opposite Vend `of. saidglink being pivotally engaged with the upper end of a check valve 21, the latter being jslidably engaged with the Vouter face ot thepartition vEat the bottom of the` latter for engagementover a tranversely extending end and slidably engaged by a/oat 25,

which latter has a sleeve concentrically Y mounted therein upon which rollers 26 are mounted` The rollers are movable; across the' upper margin ofy a triggeif'release lever 27, the lnner end of which 1s pivoted onthe bar ltasfindicated at28. Theiinner end.Y

of the lever 27 has a portion `of its upper margin removed to provi-de an inclinedfacel Q9 which is adapted to bear against the outer terminal yof the trigger'lSor projecting the latter yfrom the recess `19when the float 25 10 'ard 24.'

gravitateS t0k they lewe? vand of th, .Stamp :The Water Passage-Way"221mjaw-iowaend of IVPUTOH Sto'mrnnnicates with the'water 'outlet opening() which, in turn,

way'QQ the. other valve jis in an open positionsotliat communication isat all times f established between `one of tliefchambers land ythe'ontlet water openingl 30 and between the auc otherchamber and the inletwateropen- "ing 9.4 l

ably in the'topthereof,` with an air outlet opening' 32 which communicates with, a corresponding openingorined hin they bottom of an'air dome 33, the upperfendoftthe l latte-1"` issuing intoapip .34 whichis adapted to commnnicatewith an air storage tank* 1n I a manner" well. known 1n. the'art. Eaclilalr dome has a 4valvel floatingly Amounted l therein through Lwhich a; `36 y extends, -pthe uppenend' of-the latterv being pointed "for" i snug' engagementwith' a valve `s"eat`i37 which V@isiiorfrned,inthe -innerend of thepipe 34. .il/It willfbe apparent that `asthe water rises `in eaclr'chamber the/air in the latteriwill be aroundthe valve 35 and through the pipe 3ft ,untilf the ftwaterjreaches a predetermined height; at which vpointlthe valve y'closes on its seat in an apparent manner.

through 4inlet pipes 38, leachof which is equipped with a non-return valve of conven- Vtional" design. l

i Air is taken' into each ottlie 'chambers In operation, assumingitliat the parts of thecompressor areirr the position 'shown in ',Figl, communication is established`between fthe water ,inlet pipe 10 and thechamber 5j thronghone'ofthe inlet ways13 and "duct Y 1.13. i4'As/thischamber'fills u 'ftheloat25 is 5,5.V y y "permitting the inner end y'of the lever 27 to urged upwardlygon" the jstan ard 24," thereby y b e moveddownwardly. kThetrigger 18 corjgagernent of the trigger 18 with theabutf respondingly 4gravitates until a "depending right-angle 4extension on, its lterminal impinges against an abutment or stud'27. En-

ment 2f!" prevents thetrigger'fromfbeng locked for movement beyond Va lngVK 28 forinedv'on rthe top edge Oftheinember 14.

Tl1sleavcs"the valvei 12Y free to 'move' under Each of the chambers is provided,r preter-y ,.pressure'yof thef water inthe chamber being filled .Asthe valve 12 is fui-'ged over through the bushing 11 the inlet ways 13 and outlet ways ot thek duct l3will change position to permit the other chamber to refill and the ."lledchamber to empty.

Attention isdirected to the fact that the construction,ofltlie present mechanism is such that communication will not be establishedI between the water supply pipe and the empty "chamber until thclillcd chamber' has reached a predeterininedy lieight" lue to the' fact that although the rising of the float in thechainber being filledY holds" the trigger in that chamber' inra released position?, the triggerin the unfilled chamber is heldin a "locked position against its `lugy 528 'since re lease ofthe trigger in the lunfilled chamber is not accomplished `until 'the lient/'in `the f unfilled chamber reachesA its lowcrrnost positionl` at which time thearcuateeinner end 29 'ofthe lever l'in the unfilled chamber raises the trigger" in thennfillcd chamber yuntil it clearsy the lug' 28', "thereby 'permitting the pressure'ofv water inltheiilled chamber to move thewfalve over. `This makesv the valve positive in Tits operation and :eliminates lany possibility of the two 'chambersbeing simultaneously' filled.k

It is'"apparentA `that f while the valve '12 is being urged from oneposition'to' another the 'check "valves *21 will `be correspondingly operatedtso that the check valvein the chamber being illedis in atolose'd position overy 'the outlet passageway 22`an'd the cheokvalve in the other chamber rinanopen position.

It isbelievedi toi be apparent thatwhile a chamberfisybeing*filled with water the air h i y 1thereinyisreirpelled"outwardlythrough' the forced outwardly throughthebpening 1 dorneQS andlindnced into an airv storage tank or the like. Operation lof`^thecom presser is controlled 'by a valve'39in the supply pipe`Y 10. v

WVe yhave found that by use of a compres- Tsoryconsltru'oted in accordancewvith the invention "hereinjfdescribed it 'is `possible to "compresslair invappreciazb e volume and inexpensivelysothat compressed ain-may be used'ftol-a greater extent as a commodity.

stocidthat although we'vhave herein shown `and!described twin Achambersi these may be i multipliedfto t satisfy practicallyl any need. ',Moreover, we are aware' that various changea` fma'ybe made in the invention withini the sscope' of the claims hereto appended.

We claim: y j1. Anf" air `Loonpresso 'including twin chambers provided' with" air inlet and outlet openings and equipped with an interposed partition provided with a Water inlet yopening at the top and a water outlet opening in the bottom, a pressure operated valve slidably mounted in the partition to close com munication through the inlet opening and provided with a pair of ducts singly alignable with' the inlet opening to establish communication between the latter and one of the chambers, mechanism mounted on each side of the partition and engaged with the opposite ends of the valve including valves alternately slidable across the outlet opening in response to the movement of the firstmentioned valve when a predetermined water level is reached in each chamber.

2. An air compressor including twin chambers, each provided with a non-return inlet opening and a non-return outlet opening, a.

partition mounted between said chamberv and provided with a water inlet opening which communicates with both chambers, a valve slidably mounted in the partition across said opening to close communicationy through the latter and provided with a duct to establish communication between the inlet opening and one of the chambers for selectively filling the chambers, and means mounted in each chamber and engaged with one end of the valve and movable by the rise and fall of water in the chambers to automatically control the` movement of the valve. A

3. An air compressor including a` head equipped with chambers Aon the opposite sides thereo which `are provided with air inlet and air outlet openings,7 said head being provided with a water inlet opening` which communicates with both of said chambers and a water outlet opening which communicateswith both chambers, a valve slidably mounted in said head to close communication through said inlet opening and pro,

vided with a duct with spaced inlet Ways, either ofwhich may be engaged with the inlet opening to establish communication therebetween and one of the chambers, means mounted on each side of the head and engaged with said valve and automatically operated by the rise and fall of water in the chambers to release the valve and permit movement thereof under pressure of water in one of the chambers only after water has been completely expelled from the opposite chamber.

CALVIN ovERDoRFF. VJOHN JUHAsz. 

